(CNN) -- As the story of the tragic Newtown, Connecticut, elementary school shooting unfolds, many people are pondering: Why has there been so much violence in the U.S. lately, and what can be done to stop it?

We're universally shocked and horrified by these tragic events. The question is: What do we do now? A simple search for "WTF?" on Twitter turns up an outpouring of frustration over this story. And the comment threads on CNN.com lit up with debates over gun control.

So now what? CNN would like to hear from you. Tell us what you think needs to be done to help control violence in the world. Where do you think we should channel our frustration? Is it better gun control? Readily available health care? More money for policing and emergency response? Share what you think society needs to do to stop the killing.

Tweet your ideas with the hashtag #nowwhat, or share your thoughts in the comments below. If you're in Newtown and would like to share images, or you have remembrances, please upload them to CNNiReport.com.